SQL Server select statement based on max record date

I have three columns

user_addr_no, cust_purch_ord_no, and ord_dt

I need a table created that has

user_addr_no, ord_dt, and the cust_purch_ord_no based on that purchase order being IT'S most recent date.

so if the last date for store a was 7/1/2007 and store b had two, one on 7/1 and another on 8/3 then I would get only a single record for each

store a   7/1/2007    po#
store b   8/3/2007    po#